MCA announced that it completed its purchase...

MCA announced that it completed its purchase of 3 million shares of its common stock, or about 4% of its common shares outstanding . . . Toys ‘R’ Us, America’s largest toy-selling chain, said its sales for the eight-week Christmas season were up 26.8%, exceeding the expectations of most analysts . . . Times Mirror Co. completed the previously announced sale of H. M. Gousha Co. to Simon & Schuster Inc., a unit of Gulf & Western . . . Los Angeles-based Magnetek Inc. announced the acquisition of Houston-based Cooper Industries; McGraw-Edison Service, Columbus, Ohio, and McGraw-Edison Controls, Clawson, Mich., for undisclosed terms . . . The California State Teachers Retirement System said it chose State Street Bank & Trust Co. of Boston as master custodian for its $20-billion pension plan.